期刊
EPL
卷 81, 期 6, 页码 -出版社
EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
DOI: 10.1209/0295-5075/81/64006
关键词
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We show that the distribution of nanobubbles is inhomogeneous on the ( underwater) surface of highly orientated pyrolytic graphite ( HOPG), reflecting the atomic steps: The formation of nanobubbles is strongly enhanced at the upper side of the atomic steps, i.e., the most hydrophobic area on the surface. In contrast, no nanobubbles are formed at the lower side of the steps, i. e., the most hydrophilic area. The width of this nanobubble-free zone is approximately 20 nm. We thus establish a correlation between surface topography and nanobubble formation. In addition, we show that the pro. le of nanobubbles is sensitive to the applied AFM tip-force, demonstrating the deformability of nanobubbles. Copyright (c) EPLA, 2008.
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